978598645 has 16 divisors (see below), whose sum is σ = 1189831680. Its totient is φ = 772597504.

The previous prime is 978598637. The next prime is 978598651. The reversal of 978598645 is 546895879.

It is a cyclic number.

It is not a de Polignac number, because 978598645 - 2³ = 978598637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131412 + ... + 138658.

It is an arithmetic number, because the mean of its divisors is an integer number (74364480).

Almost surely, 2^978598645 is an apocalyptic number.

It is an amenable number.

978598645 is a deficient number, since it is larger than the sum of its proper divisors (211233035).

978598645 is a wasteful number, since it uses less digits than its factorization.

978598645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7604.

The product of its digits is 21772800, while the sum is 61.

The square root of 978598645 is about 31282.5613561294. The cubic root of 978598645 is about 992.8147102664.

The spelling of 978598645 in words is "nine hundred seventy-eight million, five hundred ninety-eight thousand, six hundred forty-five".